Seiko Prospex Collection Japanese Automatic Watch With A Navy Polyester Strap, 42.4 mm Stainless Steel Case, Rotating Bezel, Blue Coloured Dial & Date Window. Introducing a new watch design to the Prospex Land collection, the Tortoise is inspired by the popular diving watch shape nicknamed by Seiko fans as the Tortoise because of its shell-like profile. This practical timepiece is powered by the Seiko 4R automatic calibre movement and includes a rotating compass bezel, crown at 4 oclock for comfort with highly visible lumibrite on the dial and hands, easy to see in any light. Prospex is a combination of the words Professional and Specifications.Seiko Prospex timepieces are designed to be practical, reliable and durable; to meet the high standards required in extreme environments for sports lovers and adventure seekers alike. Length: 45.2 mm Weight: 87.0 g Screw case back Screw-down crown